Midland Industries 63643 Square Head Plug 3in Mpt 316SS 150lb

Product Description

The MIDLAND INDUSTRIES 63643 is a cored square head plug rated for 150 lb pressure service, threaded with a 3-inch male pipe thread (MPT) connection conforming to ASME B1.20.1 dimensional standards. Constructed from 316 stainless steel, this plug delivers strong corrosion resistance in demanding service environments. The cored design maintains full plug geometry while reducing material weight without sacrificing thread engagement or sealing integrity. It is installed by licensed plumbers, pipefitters, and mechanical contractors working on industrial and commercial piping systems where a reliable, code-compliant pipe closure is required.

This plug is rated for use with air, water, oil, natural gas, and steam media, making it suitable across a range of 150 lb-class piping applications. Typical installations include capping unused branch outlets on distribution manifolds, pressure test ports, and threaded pipe terminations in mechanical rooms, process piping, and HVAC hydronic systems. The 316 stainless steel alloy is well suited for corrosive or washdown environments where carbon steel or brass fittings are not appropriate.

Key Features

• 316 stainless steel construction for superior corrosion resistance in aggressive media environments
• 3-inch MPT connection conforming to ASME B1.20.1 thread dimensional standards
• 150 lb pressure class rating suitable for standard industrial service
• Compatible with air, water, oil, natural gas, and steam media
• Cored square head design allows wrench engagement for secure installation and removal
• Compact profile: 3.4 inches wide by 2.05 inches tall for use in tight fitting layouts

Compatibility

Designed as an OEM-style 150 lb class threaded fitting for use with air, water, oil, natural gas, and steam piping systems requiring a 3-inch MPT square head plug closure.

Installation Notes

Installation should be performed by a licensed plumber or pipefitter. Depressurize and isolate the line completely before removing or installing any threaded pipe plug. Apply an appropriate thread sealant or PTFE tape to the male threads prior to installation and tighten using a properly sized pipe wrench. Follow applicable local mechanical codes and ASME standards when closing off pressurized piping systems.